Current air quality is provided below the AQI forecast section.

Air Quality Index

The U. S. Environmental Protection Agency (EPA) has provided a scale called the Air Quality Index (AQI) for rating air quality. This scale is based on the National Ambient Air Quality Standards (NAAQS). The AQI forecast is updated once daily, excluding weekends and holidays. Alternatively, you may call the Air Quality Index Hotline at (800) 249-1234 or (860) 424-4167 for the forecast or link to Airnow.gov for the most current air quality information.

Current air quality is provided below the AQI forecast section.

Current Air Quality

Air Quality for Wednesday, 05/07/25

Good
AQI Scale

For current conditions, see map below.

Cautionary Statements

AQI Forecast

Forecast for Wednesday, 05/07/25

Good

Forecast for Thursday, 05/08/25

Good

For local forecasts, see table below.

Restrictions For Regulated Community

Wednesday, 05/07/25

For details, see operating restrictions page.

Historical Ozone Data
Forecasted Ozone Exceedance Days
Tips for Ozone Action Days
Air Monitoring in Connecticut

AIRNOW Interactive Map of Air Quality

Local AQI Forecast

Town Wednesday, 05/07/25
FineParticles (PM2.5)		 Wednesday, 05/07/25
Ozone (O3)		 Thursday, 05/08/25
FineParticles (PM2.5)		 Thursday, 05/08/25
Ozone (O3)
Bridgeport 44 50
Danbury 39 28
Greenwich 44 50
Hartford 39 33
Madison 44 44
Middletown 39 33
New Haven 44 50
New London-Groton 44 44
Stafford 33 22
Stratford 44 50
Torrington 33 22
Waterbury 39 33
Westport 44 50
If you have any questions regarding the Air Quality Forecast, please contact the Bureau of Air Management by phone at (860) 424-4152 or by email.